image.jsp

简单的‘基于web的图表生成系统’

<%@ page contentType="image/jpeg; charset=GBK" import="javax.imageio.ImageIO" %>
<jsp:useBean id="Pie3D" scope="session" class="pie.Pie3D"/>
<jsp:useBean id="de" scope="session" class="ajax.DataExchange"/>
<jsp:useBean id="rect" scope="session" class ="rect.Rect"/>
<jsp:useBean id="line" scope="session" class ="line.LineChart"/>
<%
	response.reset();
	ServletOutputStream sos = response.getOutputStream();
	if(request.getParameter("image").equals("pie")) {
		Pie3D.setData(de.getMonthData(request.getParameter("month")));
		ImageIO.write(Pie3D.getImage(), "JPEG", sos);
	} else if(request.getParameter("image").equals("rect")) {
		ImageIO.write(rect.drawRectCube(), "JPEG", sos);
	} else if(request.getParameter("image").equals("line")) {
		ImageIO.write(line.drawLineChart(), "JPEG", sos);
	}
%>